PHP magic_quotes_gpc [is enabled]
You should consider disabling magic_quotes_gpc. For more information click here.
...and...
Zenphoto core files [Some filemtimes seem out of variance.]
Perhaps there was a problem with the upload. You should check the following files:
../zp-core/plugins/google_maps/phooglelite.php
I am guessing you did not delete all the zp-core files before you upgraded as the installation instructions suggest. phooglelite.php is a file which zenphoto no longer uses.
As to the magic_quotes_gpc, I am sure that the information will be populated on that WEB page soon. You have just caught the development mid-stream. As a quick answer to what it is, it is an option in PHP which processes text in WEB page posts which is not necessary with zenphoto. You can safely ignore that warning.